Using Earned Value Management to Measure Project Performance

挣值管理在项目绩效评价中的应用

2024-10-08 14:30 project manager

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Project management starts with a plan, one that is abstract until it’s executed. However, project execution is blind without a way to measure progress and performance. You first need a project baseline to capture that plan and compare it to your actual progress. This allows you to see where you are. Once you’ve set a baseline, many techniques can help with performance management. Earned value management (EVM) is one such technique that, in a single integrated system, can accurately forecast problems so you can better manage project performance. What Is Earned Value Management (EVM)? As noted, EVM is a technique that project managers use to track the performance of their projects against project baselines. Often the progress of a project is thought of as ahead or behind schedule and over or under budget. However, what if you’re ahead of schedule, but costs are higher than your planned budget? Or, what if you’re behind schedule, but costs are lower than you first calculated? Project management software can help you with variance analysis. ProjectManager has real-time dashboards that collect live data and automatically calculate variance analyses for you. The results are then displayed on colorful charts representing cost variance, schedule variance and more. Plus, there’s no setup required! Monitoring the six project metrics shown on the real-time dashboard is how you keep track of your project as it unfolds. Get started with ProjectManager for free today. Knowing the earned value helps provide deeper information on your project. And when learning about earned value, it’s important to remember that there are three terms associated with it, each of which is slightly different. Earned Value Analysis (EVA): This project management technique is quantitative. It evaluates project performance by figuring out the likely results of the project. It does this by comparing the progress and budget of work planned to the actual costs. Earned Value Management (EVM): This methodology measures project performance with an integrated schedule and budget, which is based on the project work breakdown structure (WBS). Earned Value Management System (EVMS): This is the collection of tools, templates, processes and procedures that an organization uses to do EVM. When to Use Earned Value Analysis in Project Management There are several times in which earned value analysis is beneficial for assessing project performance and progress and identifying variances against the planned schedule and budget. It can also help forecast future performance by estimating completion dates and costs based on current progress and trends. Earned value analysis also helps find out how much budget has been spent relative to the work completed. This allows for better financial control in projects. It also highlights discrepancies between planned and actual performance, which allows project managers to quickly enact corrective action. Complex projects benefit from using earned value analysis as it provides a comprehensive view of progress. This helps to manage dependencies and resource allocation effectively. Finally, managers can use earned value analysis when reporting to stakeholders on the project status. Who Participates in the Earned Value Analysis Process? There are multiple stakeholders involved in the earned value analysis process. Let’s look at the key participants who are typically included when going through this process. Project Manager The project manager is responsible for overseeing the project and leads the earned value analysis process. They will interpret results and make strategic decisions based on that analysis. They also ensure that the collected data is accurate, communicate the results of the process to stakeholders and take actions to correct variances found. Project Team Members The project team is responsible for executing the project tasks, providing updates on progress and more. This provides input on actual progress and work completed. This helps gather data necessary for calculating earned value metrics. EVM Specialists An earned value management specialist is responsible for establishing baselines for the project’s scope, schedule and budget. They also collect and analyze data related to project performance, including actual costs, scheduled tasks and completed work, which helps deliver a more accurate analysis. Earned Value Management Core Concepts Earned value analysis based on a performance measurement baseline is how you can compare your project plan to your project execution. This allows project managers to answer three questions: Where were we, where are we now and where are we going? This requires accessing the following data points. Planned Value (PV) The planned value is where your project tasks should be at a specific point in the project schedule and cost estimation. These two values are the planned value of where you expect to be within the current reporting period. This value can either be cumulative or current. The former is the approved budget for planned activities that have to be done generally throughout the whole project. The latter is the approved budget for those planned activities being done over a specific period of the project, whether days, weeks or months. Planned Value (PV) = % of project completed (planned) * Project Budget Actual Cost (AC) This is the actual cost of the work that’s been completed over a specific project period. The value refers to what has been spent, either cumulatively or currently. That is, either the actual cost for work done up to the point in which it is being calculated or over a given period of days, weeks or months. Actual Cost (AC) = Actual costs to date Earned Value (EV) This is the quantification of the value of the work that’s been performed up to a certain date in the project. The cumulative earned value is the sum of the budget over the whole project up to the date of the calculation while the current earned value is only carried out for a given period. Earned Value = % of completed work * BAC (Budget at Completion) How Do You Calculate Earned Value Management? Now that we’ve learned about the foundational concepts of EVM, let’s learn how to calculate earned value management. To do so, we’ll use simple earned value management formulas, which are explained below. Earned Value Management Formulas & Metrics Some calculations can be done quickly and easily to execute EVM. EVM formulas can be divided into two groups: performance indexes and variance analysis formulas. Here they are: Schedule Variance (SV) The schedule variance is a way for project managers to figure out how much ahead or behind schedule, they are in the project. The formula to figure this out is as follows. Schedule Variance (SV) = Earned value (EV) – Planned Value (PV) Cost Variance (CV) Cost variance is the difference between the actual cost of the project at that point it’s calculated compared against the planned budget cost for that period of time in the project plan. The formula is below. Cost Variance (CV) = Earned value (EV) – Actual Cost (AC) Schedule Performance Index (SPI) The schedule performance index is a subset of EVM, which shows whether a project is ahead or behind schedule. It calculates the ratio of the performed work to the scheduled work. The formula for this is as follows. Schedule Performance Index (SPI) = Earned value (EV) / Planned Value (PV) Calculating the schedule performance index involves dividing the EV by the PV to measure progress achieved against where you expected to progress at a certain point. If you’ve come up with a value less than 1.0, it means that you’ve done less work than you projected for this point. While a value greater than 1.0 means you’ve completed more than was planned. Cost Performance Index (CPI) The cost performance index measures how efficient costs are in the project. It’s shown in a ratio of earned value to actual costs. Cost Performance Index (CPI) = Earned Value (EV) / Actual Cost (AC) For this calculation, you divide EV by the AC to measure the value of work completed against its actual cost. Again, if you reach a figure less than 1.0, your costs are higher than budgeted. A number higher than 1.0 means the costs are less than budgeted. Estimated at Completion (EAC) Estimated at completion is the current expectation of what the total costs will be for the project when it is done. Estimated at Completion (EAC) = Budget at completion (BAC) / Cost performance index (CPI) With this calculation, you divide the total project budget by the CPI value you figured out above. Budget at Completion This represents the total budget allocated for the project or a specific task at the time of project completion. To calculate this, first define the project scope, estimate costs, create a work breakdown structure and sum the costs. The formula is: BAC = Total Estimated Costs for the Project Estimate to Complete (ETC) This represents the forecasted cost required to complete the remaining work of a project. The formula to calculate this is as follows: ETC = BAC (Budget at Completion) – EV (Earned Value) / CPI (Cost Performance Index) To-Complete Performance Index (TCPI) This assesses the cost performance required to complete the remaining work of a project within a specified budget. The formula is: TCIP= BAC (Budget at Completion) – EV (Earned Value) / BACK – AC (Actual Cost) Once these metrics have been calculated using the earned value management formulas below, they can be visualized using an earned value management chart. What Is an Earned Value Management Chart? An earned value management chart is a graphical representation used to visualize and analyze the performance of a project in terms of cost and schedule. Key components of EVM charts included the planned value (PV), or the budget costs of work scheduled to be completed by a specific time, earned value (EV), budgeted costs of work that has actually been completed and actual cost (AC), costs incurred for the work completed by a specific time. Key Benefits of Earned Value Management It should be clear by now the importance of earned value management, but that doesn’t mean it hurts to outline some of the key benefits. Below are just a few, which are briefly defined. Helps Keep Projects On Track Project managers use EVM to find cost and schedule discrepancies early so that they can be quickly dealt with before causing the project to fall too far behind. This type of monitoring of time and cost is essential to keeping projects on track. Holistic Project Performance Monitoring Cost and time aren’t the only metrics that must be tracked to ensure the project is delivered successfully. EVM provides coverage of the entire project’s metrics, including scope, for more insightful decision-making. Accurate Project Forecasting Accurate estimates are critical to tracking cost and schedule outcomes. EVM helps to deliver better predictions of how much more time and money is going to be needed to finish the project. This helps to manage stakeholder expectations as well as prepare for future needs. Disadvantages of Earned Value Management EVM is a technique that you can use to manage and control your project, but EVM won’t solve everything. It doesn’t always work on your project and it’s not a magic bullet that can pierce all project problems. In fact, it has some pitfalls. You can’t rely solely on earned value management. Remember, it’s merely calculating a single objective data point. The earned value of your project can change and can change fast. Naturally, cost and progress are seldom reflected in the actual project as they are when you’re executing the project. So, EVM acts as a safeguard and provides useful data. It’s best to make these calculations monthly or more frequently if your project is shorter in duration. EVM Doesn’t Ensure Quality There are some things that EVM doesn’t offer a window to view, such as customer satisfaction and the quality of the project. The project performance as it relates to important factors such as schedule and budget are tracked with EVM. However, a successful project is not one merely brought in on time and within budget. If your customer is unhappy or the project or service quality is poor, there’s a big problem regardless of meeting schedule and budget demands. Without Accurate Data, EVM is Useless If you don’t include all actual costs in your calculations, your results won’t accurately reflect the progress or performance of the project. If you’re using software that automatically makes these calculations you need to be doubly cautious, as it might overlook critical data and give you a misleading result. EVM Needs Context Finally, don’t just deliver the numbers to customers, stakeholders or whomever you’re reporting to—they need to know what those numbers mean and how you’re using them. Be clear in your language and avoid jargon. You know what you’re talking about, but it’s important that who you’re talking to understands as well. Don’t dumb it down, of course; just speak clearly and simply. Being able to effectively communicate EVM is as important as being able to calculate it. Measure Performance With ProjectManager Calculating performance is crucial to keeping projects on schedule and within budget, but what if you don’t have a calculator? Seriously, it’s a lot of work gathering all that data and calculating each equation. While important, it’s pulling you away from other important issues—and it’s so easily automated! ProjectManager is award-winning software that automatically crunches data in real time to deliver the information you need and track the performance of your project. Every time a team member updates his or her status, that data is shared throughout our software, allowing you to easily make data-driven decisions. Track Your Work With One-Click Reports To get a deeper look at the data than the real-time dashboard can provide, use one-click reports. You can quickly generate status and portfolio reports as well as reports on cost, time, workload and more. Plus, you can easily filter each report to show only the information you’re interested in. Then share reports as PDF attachments or even print them out for stakeholder presentations and keep everyone updated. If you do notice a discrepancy and want to dig deeper to discover what the issue is, we have a reporting feature that gets granular. You can filter the results of the report to show just the data you want. These reports can also be shared, so if you’re just tracking progress to present to your stakeholders, we have you covered. Visualize The Project’s Progress Because our software is constantly updating, you can keep track of your project from many points. For example, our online Gantt chart is great for planning and scheduling your project, but it also has a monitoring feature. The duration bar that links the start and end date to a task on the project timeline will reflect your team’s progress with sharing to indicate how close the task is to completion. Our software works with your other earned value tools to give you a full picture of your project’s performance. Not only that, we offer a full plate of project management tools that all work together to make sure your projects are performing and meeting stakeholder expectations. Our software makes knowing your earned value simpler. ProjectManager is online project management software that makes measuring progress and performing EVM easy. With its real-time dashboard, project metrics are instantly calculated with live data and delivered in easy-to-read charts and graphs that can be shared with a keystroke. Try it yourself with this free 30-day trial.
项目管理从一个计划开始,一个在执行之前都是抽象的计划。然而,项目执行是盲目的,没有办法衡量进度和绩效。您首先需要一个项目基线来捕获该计划并将其与实际进度进行比较。这可以让你看到你在哪里。 一旦你设定了一个基准,许多技术都可以帮助你进行绩效管理。挣值管理(EVM)就是这样一种技术,它可以在单个集成系统中准确地预测问题,从而更好地管理项目绩效。 什么是挣值管理(EVM)? 如前所述,EVM是项目经理用来根据项目基线跟踪项目性能的一种技术。项目的进度通常被认为是提前或落后于计划,超过或低于预算。然而,如果你提前了计划,但成本高于你的计划预算呢?或者,如果你落后于计划,但成本低于你最初计算的呢? 项目管理软件可以帮助您进行差异分析。ProjectManager具有实时仪表板,可收集实时数据并自动为您计算差异分析。然后,结果显示在彩色图表上,代表成本差异,进度差异等。另外,没有设置需要!监控实时仪表板上显示的六个项目指标是您在项目展开时跟踪项目的方式。立即免费开始使用ProjectManager。 了解挣值有助于提供有关项目的更深入信息。在学习挣值时,重要的是要记住有三个与之相关的术语,每个术语都略有不同。 挣值分析(EVA):这种项目管理技术是定量的。它通过计算出项目可能的结果来评估项目绩效。它通过将计划工作的进度和预算与实际成本进行比较来做到这一点。 挣值管理(EVM):这种方法通过基于项目工作分解结构(WBS)的综合进度和预算来衡量项目绩效。 挣值管理系统(EVMS):这是一个组织用来执行EVM的工具、模板、流程和程序的集合。 在项目管理中何时使用挣值分析 有时,赢得值分析有助于评估项目绩效和进度以及识别与计划进度和预算的差异。它还可以通过根据当前的进度和趋势估计完成日期和成本来帮助预测未来的业绩。 挣值分析还有助于了解相对于已完成的工作,花费了多少预算。这样可以更好地对项目进行财务控制。它还突出了计划和实际业绩之间的差异,使项目管理人员能够迅速采取纠正行动。 复杂的项目受益于使用挣值分析,因为它提供了一个全面的进度视图。这有助于有效地管理依赖关系和资源分配。最后,经理在向利益相关者报告项目状态时可以使用挣值分析。 谁参与了挣值分析过程? 在挣值分析过程中涉及多个利益相关者。让我们看看在经历这个过程时通常包括的关键参与者。 项目经理 项目经理负责监督项目并领导挣值分析过程。他们将解释结果,并根据分析做出战略决策。他们还确保收集的数据是准确的,将流程结果传达给利益相关者,并采取行动纠正发现的差异。 项目团队成员 项目团队负责执行项目任务、提供进度更新等。这提供了关于实际进展和已完成工作的投入。这有助于收集计算挣值指标所需的数据。 EVM专家 挣值管理专家负责确定项目范围、时间表和预算的基线。他们还收集和分析与项目绩效相关的数据,包括实际成本、计划任务和已完成的工作,这有助于提供更准确的分析。 挣值管理核心概念 基于绩效度量基准的挣值分析是您比较项目计划和项目执行的方法。这使得项目经理可以回答三个问题:我们在哪里,我们现在在哪里,我们要去哪里?这需要访问以下数据点。 计划值(PV) 计划值是项目任务在项目进度和成本估计中的特定点处的位置。这两个值是您在当前报告期间内预期的计划值。此值可以是累积值,也可以是当前值。前者是在整个项目中必须进行的计划活动的核定预算。后者是在项目的特定时期内(无论是几天、几周还是几个月)正在进行的计划活动的核定预算。 计划价值(PV)=项目完成百分比(计划)* 项目预算 实际成本(AC) 这是在特定项目期间完成的工作的实际成本。价值是指累计或当前的支出。也就是说,或者是计算时所完成工作的实际费用,或者是在几天、几周或几个月内完成工作的实际费用。 实际成本(AC)=迄今为止的实际成本 挣值(EV) 这是对项目中到某个日期为止所完成的工作的价值的量化。累计挣值是截至计算日期整个项目的预算总和,而当前挣值仅在给定期间内执行。 挣值=已完成工作的百分比 * BAC(完成时的预算) 如何计算挣值管理? 现在我们已经了解了EVM的基本概念,让我们学习如何计算挣值管理。为此,我们将使用简单的挣值管理公式,如下所述。 挣值管理公式和方法 一些计算可以快速轻松地完成以执行EVM。EVM公式可以分为两类:性能指标和方差分析公式。他们是: 进度差异(SV) 进度差异是项目经理计算他们在项目中提前或落后于进度多少的一种方法。计算公式如下。 进度差异(SV)=挣值(EV)-计划值(PV) 成本差异(CV) 成本差异是项目实际成本与项目计划中该时间段的计划预算成本之间的差异。公式如下。 成本差异(CV)=挣值(EV)-实际成本(AC) 进度绩效指标(SPI) 进度性能指标是EVM的一个子集,它显示项目是提前还是落后于进度。它计算已执行工时与计划工时的比率。其公式如下。 进度绩效指数(SPI)=挣值(EV)/计划值(PV) 计算进度绩效指数涉及到将EV除以PV,以衡量在某个特定点上所取得的进展与您预期的进展。如果你得到的值小于1.0,这意味着你做的工作比你计划的要少。而大于1.0的值意味着您完成的工作量超过了计划。 成本绩效指数(CPI) 成本绩效指数衡量项目中成本的有效性。它以挣值与实际成本的比率显示。 成本绩效指数(CPI)=挣值(EV)/实际成本(AC) 对于此计算,您将EV除以AC以衡量已完成工作的价值与其实际成本。同样,如果你达到一个小于1.0的数字,你的成本高于预算。高于1.0的数字意味着成本低于预算。 完工时估算(EAC) 完成时的估计是当前对项目完成时的总成本的预期。 完工时估计数(EAC)=完工时预算(BAC)/成本绩效指数(CPI) 通过这种计算,您可以将项目总预算除以上面计算出的CPI值。 竣工预算 这表示在项目完成时分配给项目或特定任务的总预算。为了计算这个,首先定义项目范围,估计成本,创建工作分解结构并汇总成本。其公式为: BAC =项目总估算成本 完成估算(ETC) 这是完成项目剩余工作所需的预测费用。计算公式如下: ETC = BAC(完成时的预算)- EV(挣值)/ CPI(成本绩效指数) 待完成绩效指数(TCPI) 它评估在规定预算内完成项目剩余工作所需的成本效益。其公式为: TCIP= BAC(完成时的预算)- EV(挣值)/ BACK - AC(实际成本) 一旦使用下面的挣值管理公式计算出这些指标,就可以使用挣值管理图表将其可视化。 什么是挣值管理图? 挣值管理图是一种图形化表示,用于可视化和分析项目在成本和进度方面的绩效。EVM图的关键组成部分包括计划价值(PV),或计划在特定时间完成的工作的预算成本,挣值(EV),实际完成的工作的预算成本和实际成本(AC),在特定时间完成的工作所产生的成本。 挣值管理的主要优势 挣值管理的重要性现在应该很清楚了,但这并不意味着概述一些关键的好处是有害的。下面是一些简单的定义。 帮助保持项目正常进行 项目经理使用EVM来及早发现成本和进度差异,以便在导致项目落后太多之前快速处理这些差异。这种对时间和成本的监测对于保持项目正常进行至关重要。 整体项目绩效监控 成本和时间并不是确保项目成功交付所必须跟踪的唯一指标。EVM覆盖了整个项目的度量标准,包括范围,以便做出更有洞察力的决策。 准确的项目预测 准确的估计对于跟踪成本和进度结果至关重要。EVM有助于更好地预测完成项目需要多少时间和金钱。这有助于管理利益相关者的期望,并为未来的需求做好准备。 挣值管理的缺点 EVM是一种可以用来管理和控制项目的技术,但EVM并不能解决所有问题。它并不总是对你的项目有效,它也不是一颗可以穿透所有项目问题的灵丹妙药。事实上,它有一些缺陷。 你不能仅仅依靠挣值管理。记住,它只是计算一个客观的数据点。项目的挣值可能会变化,而且变化得很快。当然,成本和进度很少像在执行项目时那样反映在实际项目中。因此,EVM作为一种保障并提供有用的数据。最好每月进行这些计算,如果项目持续时间较短,则更频繁。 EVM不能保证质量 有一些东西EVM不提供一个窗口来查看,如客户满意度和项目的质量。项目绩效与进度和预算等重要因素有关,因此使用EVM进行跟踪。然而,一个成功的项目不仅仅是在时间和预算范围内完成。如果你的客户不满意,或者项目或服务质量很差,那么不管满足时间表和预算要求,都有一个大问题。 没有准确的数据,EVM是无用的 如果在计算中不包括所有实际成本,则计算结果将无法准确反映项目的进度或绩效。如果你使用的软件会自动进行这些计算,你需要加倍小心,因为它可能会忽略关键数据,给你一个误导性的结果。 EVM需要上下文 最后,不要只把数字交给客户、利益相关者或任何你要报告的人他们需要知道这些数字的含义以及你如何使用它们。语言要清晰,避免行话。你知道你在说什么,但重要的是你在和谁说话也明白。当然,不要把它说得太简单,只要说得清楚、简单就行了。能够有效地传达EVM与能够计算它一样重要。 使用ProjectManager衡量绩效 计算性能对于保持项目按计划进行和在预算范围内至关重要,但是如果没有计算器怎么办?说真的,收集所有的数据和计算每个方程是一项很大的工作。虽然很重要,但它会把你从其他重要的问题上拉下来而且它很容易自动化! ProjectManager是一款屡获殊荣的软件,可实时自动处理数据,以提供您所需的信息并跟踪项目的性能。每当团队成员更新其状态时,该数据将在我们的软件中共享,使您能够轻松做出数据驱动的决策。 使用一键报告跟踪您的工作 要比实时仪表板更深入地查看数据,请使用一键报告。您可以快速生成状态和投资组合报告,以及有关成本、时间、工作量等的报告。此外,您可以轻松过滤每个报告,仅显示您感兴趣的信息。然后将报告作为PDF附件共享,甚至打印出来用于利益相关者演示,并让每个人都保持更新。 如果您确实注意到了差异,并希望深入挖掘以发现问题所在,我们有一个细化的报告功能。您可以筛选报告的结果,以仅显示所需的数据。这些报告也可以共享,因此,如果您只是在跟踪进度并向利益相关者展示,我们可以为您提供帮助。 可视化项目进展 由于我们的软件不断更新,您可以从多个角度跟踪您的项目。例如,我们的在线甘特图非常适合规划和安排您的项目,但它也具有监控功能。将开始日期和结束日期链接到项目时间轴上的任务的工期栏将通过共享反映工作组的进度,以指示任务离完成还有多远。 我们的软件可与您的其他挣值工具配合使用,为您提供项目绩效的全貌。不仅如此,我们还提供了一整套项目管理工具,这些工具可以协同工作,以确保您的项目正在执行并满足利益相关者的期望。我们的软件让您更轻松地了解您的挣值。 ProjectManager是一款在线项目管理软件,可以轻松测量进度和执行EVM。借助其实时仪表板,可以使用实时数据即时计算项目指标,并以易于阅读的图表和图形形式提供,可以与客户共享。试试这个免费的30天试用版。

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